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</div><hr /><div id="intro.event" class="preface">
  <h1 class="title">简介</h1>
  <p class="para">
   This is an extension to efficiently schedule I/O, time and signal based
   events using the best I/O notification mechanism available for specific
   platform. This is a port of libevent to the PHP infrastructure.
  </p>
  <blockquote class="note"><p><strong class="note">Note</strong>: 
   <p class="para">
    Note, Windows support introduced in <em>event-1.9.0</em>.
   </p>
  </p></blockquote>
  <p class="para">
   Version
   <em class="emphasis">1.0.0</em>
   introduces new object-oriented API (breaking backwards compatibility), and
   support of libevent 2+ including HTTP, DNS, OpenSSL and the event listener.
  </p>
  <blockquote class="note"><p><strong class="note">Note</strong>: 
   <p class="para">
    Note,
    <em>event-1.0.0</em>
    and greater is not compatible with previous versions.
   </p>
  </p></blockquote>
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